共查询到19条相似文献,搜索用时 330 毫秒
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结合利用雪崩光电二极管(APD)进行红外单光子探测电路模型的工作原理和特点以及传输线瞬态电脉冲产生的过程,提出了将传输线瞬态过程脉冲发生电路模型用于APD雪崩抑制的一种新方法,该方法可以实现利用APD门模工作方式进行红外单光子探测的过程.主要从理论上计算了红外单光子信号入射APD时,传输线脉冲发生电路模型中负载电阻输出电脉冲的特点,讨论了传输线终端不同边界条件对输出电脉冲的影响,通过理论计算确定了这种利用APD进行红外单光子探测新模型的电路结构与参数,证明了该电路模型用于红外单光子探测APD门模工作方式的
关键词:
红外单光子探测技术
雪崩光电二极管(APD)
抑制电路
传输线瞬态过程 相似文献
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为了选择高性能单光子探测器件,采用无源抑制方法对工作在盖革模式下的雪崩光电二极管(APD: avalanche photodiode)特性进行了测量。利用APD两端的电压在雪崩后趋于稳定的特性,获得了一种确定暗击穿电压的方法。特性测量实验结果表明:降低温度能加宽APD的最佳工作区域范围,并提高最佳增益值,从而使APD具有更高的灵敏度。通过对EG&;G系列APD和外延APD暗电流和信噪比特性进行比较,发现外延 APD具有良好的噪声性能和信噪比性能,适用于单光子探测。 相似文献
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《中国光学与应用光学文摘》2004,(5)
TN918 2004053822 APD单光子探测技术=APD single photon detection technology[刊,中]/张鹏飞(广东工业大学应用物理系,广东。广州(510090)),周金运…∥光电子技术与信息,—2003,16(6),—6-11 分别介绍了量子保密通信用APD单光子探测技术及其工作在无源抑制、有源抑制和门模式下的基本工作 相似文献
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量子信息技术近十多年来的快速发展对单光子探测器的性能提出了更高的要求,高性能单光子探测器也因此受到了更多的关注.与传统的单光子探测器相比,超导转变边沿(TES)单光子探测器在探测效率、能量分辨、光子数分辨和暗计数等方面具有突出优势.目前,超导TES单光子探测器已经被成功地应用在量子光学实验和量子密钥分配系统中,未来在量子信息技术等研究领域具有更广泛的应用.本文从超导TES单光子探测器的工作原理、制备流程、测试系统、主要性能指标以及研究现状和进展等方面对该探测器技术进行简要综述. 相似文献
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Time response of avalanche photodiode (APD) is very important in photon counting systems, and there are many models for circuit simulation. But these studies generally based on the carrier rate equations of steady-state condition, disagree with the single-photon-indicate condition. In this paper, a time response function based on an integration of APD’s sub-domain carriers for reach-through APD arising from a single photo-carrier is derived. The analytical results are shown to be in good accord with experimental results. 相似文献
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当光微弱到以单个光子发射时,成像系统只有利用光子计数模式才能探测到单光子信息。采用基于碰撞电离效应的全固态雪崩光电二极管作为探测元件,构成微光环境下的光子计数成像实验系统。该系统的硬件主要由雪崩光电二极管构成的单光子计数器、计算机、微光照度计、2维电控导轨、控制器、暗箱等组成。控制器的软件在Altera公司Quartus环境下设计,主要完成导轨运动的控制;上位机软件采用VC++编程实现系统的数据采集处理、系统功能控制和光子计数图像显示等。该系统为全固态结构,工作电压小于35 V,暗计数率小于4 Hz。所建光子计数成像系统在10-5 lx微光环境下实现了目标的探测成像。 相似文献
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《中国光学快报(英文版)》2016,(3)
Solar-blind ultraviolet detection is of great importance in astronomy and industrial and military applications.Here, we report enhanced solar-blind ultraviolet single-photon detection by a normal silicon avalanche photodiode(Si APD) single-photon detector with a specially designed photon-collecting device. By re-focusing the reflected photon from the Si chip surface on the detection area by the aluminum-coated hemisphere, the detection efficiency of the Si APD at 280 nm can be improved to 4.62%. This system has the potential for high-efficiency photon detection in the solar-blind ultraviolet regime with low noise. 相似文献
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Detection efficiency characteristics of free-running In Ga As/In P single photon detector using passive quenching active reset IC 下载免费PDF全文
In Ga As/In P avalanche photodiodes(APD) are rarely used in a free-running regime for near-infrared single photon detection. In order to overcome the detrimental afterpulsing, we demonstrate a passive quenching active reset integrated circuit. Taking advantage of the inherent fast passive quenching process and active reset to reduce reset time, the integrated circuit is useful for reducing afterpulses and is also area-efficient. We investigate the free-running single photon detector's afterpulsing effect, de-trapping time, dark count rate, and photon detection efficiency, and also compare with gated regime operation. After correction for deadtime and afterpulse, we find that the passive quenching active reset free-running single photon detector's performance is consistent with gated operation. 相似文献
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A highly sensitive photodetection system with a detection limit of 1 photon/s was developed. This system uses a commercially available 200-microm-diameter silicon avalanche photodiode (APD) and an in-house-developed ultralow-noise readout circuit, which are both cooled to 77 K. When the APD operates at a low gain of approximately 10, it has a high-linearity response to the number of incident photons and a low excess noise factor. The APD also has a high quantum efficiency and a dark current of less than 1 e/s at 77 K. This photodetection system will shorten measurement time and permit higher spatial and wavelength resolution for near-field scanning optical microscopes. 相似文献
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Quantum information systems are commonly operated in conventional communication bands (1310 and 1550 nm) over an optical fiber
to take advantage of low transmission loss. However, the detection and spectral measurement of single photons in these communication
bands are limited due to high noise and low sensitivity of single photon detectors in the wavelength ranges. To demonstrate
high efficiency detection and high sensitivity spectral measurement, we have implemented a single photon detector and a spectrometer
based on frequency up-conversion technology. This detector and spectrometer uses a 5-cm periodically poled lithium niobate
(PPLN) waveguide and a tunable pump laser around 1550 nm, to convert signal photons around 1310 to 710 nm. The converted photons
are then detected by a silicon-based avalanche photodiode (APD). The overall detection efficiency of the single photon detector
is as high as 32%, which is three times higher than commercial InGaAs APDs. The sensitivity of the spectrometer is measured
to be −126 dBm, which is at least three orders-of-magnitude better than any commercial optical spectrum analyzer in this wavelength
range. 相似文献